Home » Server Options » Replication » ora-04020: deadlock detected while trying to lock objext XX.MLOG$_YY_@MyDBLINK.US.ORACLE.COM
icon8.gif  ora-04020: deadlock detected while trying to lock objext XX.MLOG$_YY_@MyDBLINK.US.ORACLE.COM [message #138037] Mon, 19 September 2005 09:20 Go to next message
FRosa
Messages: 2
Registered: September 2005
Location: Rome
Junior Member

Hi,
I have two DB (A=Master and B=Replication), I have created Snapshot Log on table of DB A and I have created the materialized view (snapshot) on DB B. I have also created the same user on both DB.
When I launch the Create command the snapshot table is correct and contains the exact number of rows.
When I execute the refresh command execute DBMS_SNAPSHOT.REFRESH("system.Snapshot_Name"); Oracle send the message:

ORA-12018: following error encountered during code generation for
"system"."SnapshotName".
ORA-04020: deadlock detected while trying to lock objext BB.MLOG$_YY@DBLink_On-BB
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 794
... Etc ...

Someone can help me ? Embarassed
icon7.gif  Re: ora-04020: deadlock detected while trying to lock objext XX.MLOG$_YY_@MyDBLINK.US.ORACLE.COM [message #138051 is a reply to message #138037] Mon, 19 September 2005 10:51 Go to previous message
FRosa
Messages: 2
Registered: September 2005
Location: Rome
Junior Member

The problem is occurred when execute the snapshot on materialized view of view. The REFRESH option must be used is COMPLETE and not other. Laughing Cool Razz
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